Comparable to SP4 and BTL4 series drivers. Solid 4″ workhorse subs that work well in just about any application. Standard with the Plus coil and 4 spiders. 3500W-4500W. 12″, 15″, and 18″ sizes.
New cooling and inductance features that are set up in stages. The first stage is a machined aluminum pole sleeve. This provides better heat wicking and is the first portion of inductance linearizing and reduction. The second stage is a combination of the pole sleeve and an aluminum domed compression cap. This increases the compression ratio for cooling as well as adds some outstroke inductance reduction. The third stage utilizes the pole sleeve, the compression cap, and a thick aluminum finned extrustion that again lowers and linearizes inductance as well as aids in thermal dissipation. With the third stage we have reduced inductance by almost a factor of 3 over utilizing none of the aluminum.
All leads are stitched in the same pattern and use the bolted terminal block as the original hybrid design. But we have added push terminals that use this same setup with the ability to handle much larger wire and completely removing the multiple solder and crimp points that could introduce unwanted resistance.
Dual 1 and Dual 2 Ohm
Extra heavy aluminum basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Dual layer wide foam surround
Standard heavy duty stitched hybrid lead or push/hybrid termination
144 tinsel count leads
FEA optimized motor
2750W on up depending on options
Open column motor design for increased cooling
4” diameter 4 layer coil
Standard heavy duty coils
N52UH Neo magnets
10″ Progressive spiders (options for 3-5 depending on series)
Water jet and machined in house at Fi
3 stage inductance and cooling options
12″, 15″, and 18″sizes
Coils DUAL 1 | DUAL 2 Fs Hz 32.8 Hz Re 0.7 | 1.4 Qms 6.62 Qes 0.45 Qts 0.42 Mms 367g Cms N/A Sd 480cm^2 Vas 20.70 l Spl 83.9dB Bl 15.27 N/A | 21.6 N/A Xmax 34mm (One Way) Rms 4500W Overall ø 12.625" Cutout ø 11.125" Mounting Depth 9.375" Displacment .19 cuft Sealed ft3 N/A Ported ft3 1.8-2.5 cuft